Izimpushana ze-polymer ezihlakazeka kabusha ziyizithasiselo ezibalulekile odakeni oluthuthukisa ukuguquguquka, amandla okubopha kanye nezakhiwo zokugcina amanzi zomkhiqizo wokugcina. Kodwa-ke, kunezinhlobo eziningi ezahlukene zezimpushana ze-polymer ezihlakazeka kabusha emakethe, futhi ukukhetha leyo ehambisana nezidingo zakho ezithile kungaba inselele.
Okokuqala, kuyadingeka ukuqonda indima yezimpushana ze-polymer ezihlakazeka kabusha odakeni. Lo mkhiqizo uyi-copolymer ye-vinyl acetate ne-ethylene, eyomisiwe nge-emulsion ye-polymer enamanzi. Impushana yakhelwe ukuthuthukisa izakhiwo zodaka, ikakhulukazi mayelana nokuguquguquka, ukusebenza kahle, ukunamathela kanye nokugcinwa kwamanzi. Ukwengeza, ikhuthaza ukugeleza kukasimende okungcono, ukunciphisa ingozi yokuqhekeka, ukushwabana nothuli.
Okulandelayo yizici ezibalulekile okufanele uzicabangele lapho ukhetha impushana ye-polymer ehlakazeka kabusha efanele yohlelo lwakho lodaka.
Uhlobo lodaka
Isici sokuqala okufanele usicabangele uhlobo lodaka ohlela ukulisebenzisa. Kunezinhlobo eziningi zodaka, okuhlanganisa udaka olusekelwe kusimende, udaka olusekelwe ku-lime noma udaka olusekelwe ku-gypsum, kanye ne-epoxy resin mortar. Ngayinye inezinto zayo ezithile kanye nezidingo, ezizonquma uhlobo lwempushana ye-polymer ehlakazeka kabusha okufanele ikhethwe. Izisimende zikasimende yizona ezivame kakhulu futhi zidinga izimpushana ze-polymer ezihlakazeka kabusha ezinokugcinwa kahle kwamanzi, amandla ebhondi nokusebenza kahle.
Indlela yohlelo lokusebenza
Indlela yokufaka isicelo nayo ibalulekile lapho ukhetha impushana ye-polymer ehlakazeka kabusha. Eminye imikhiqizo yakhelwe ukusetshenziswa ekwenziweni kwengxube eyomile, kanti eminye ilungele ukuxuba okumanzi. Ekwakhekeni kwenhlanganisela eyomile, i-polymer powder kufanele ikwazi ukuhlakazeka ngokushesha futhi ngokulinganayo ukwakha i-emulsion ezinzile ngamanzi. Ekusetshenzisweni kokuxuba okumanzi, i-polymer powder kufanele ibe ne-dispersibility enhle futhi ikwazi ukuxuba ngokuphumelelayo nezinye izithasiselo kanye nosimende.
Izidingo zokusebenza
Izidingo zokusebenza zodaka zizophinde zibe nomthelela ekukhethweni kwempushana ye-polymer ehlakazeka kabusha. Izinhlelo zokusebenza ezihlukene zinezidingo ezihlukene zamandla, ukuguquguquka nokuqina. Isibonelo, uma ufuna ukwenza udaka lwangaphandle odongeni, uzodinga umkhiqizo onokumelana namanzi okuhle kakhulu kanye nokuzinza kweqhwa. Ngaphandle kwalokho, uma usebenzisa i-adhesive ye-tile, udinga i-polymer powder ehlakazeka kabusha enokunamathela okuhle namandla ahlangene.
Izakhiwo ze-polymer powder
Esinye isici esibalulekile okufanele sicatshangelwe lapho ukhetha impushana ye-polymer ehlakazeka kabusha ukusebenza komkhiqizo. Izici ezibalulekile okufanele uzibheke zifaka usayizi wezinhlayiyana, izinga lokushisa lokushintsha kwengilazi (Tg) nokuqukethwe okuqinile. Ubukhulu bezinhlayiyana zempushana buthinta ukuhlakazeka kwayo namandla okubopha. Osayizi bezinhlayiyana ezincane (ngaphansi kuka-80μm) banikeza ukugcinwa kwamanzi okungcono, kuyilapho ubukhulu bezinhlayiya ezinkulu (abangaphezu kuka-250μm) buhlinzeka ngokusebenza okungcono.
Izinga lokushisa lengilazi (Tg) lempushana ye-polymer ehlakazeka kabusha linquma ukuguquguquka nokunamathela kwayo. I-Tg ngaphezu kwezinga lokushisa legumbi (25°C) isho ukuthi impushana iqinile, kanti i-Tg ngaphansi kwezinga lokushisa legumbi lisho ukuthi impushana iyagobeka. Izimpushana ze-polymer ezihlakazeka kabusha ezine-Tg ephansi (ngezansi -15°C) zilungele izimo zezulu ezibandayo lapho udaka lungase lube nemijikelezo yokuqhwaza.
Ekugcineni, okuqukethwe okuqinile kwempushana ye-polymer ehlakazeka kabusha kunquma izinga lokusetshenziswa kwayo kanye nenani lamanzi adingekayo ukuze kuxutshwe. Okuqukethwe okuqinile okuphakeme (ngaphezu kwama-95%) kudinga impushana encane ukuze kuzuzwe izakhiwo ezifiselekayo, okuholela ezindlekweni eziphansi kanye nokuncipha okuncane.
Ekuphetheni
Ukukhetha impushana ye-polymer ehlakazeka kabusha efanele ukuze kufakwe udaka kubalulekile ukuze kuzuzwe ukusebenza okufunayo nokuqina komkhiqizo wokugcina. Ngokucabangela uhlobo lodaka, indlela yokwakha, izidingo zokusebenza kanye nezici ze-polymer powder, ungakhetha umkhiqizo ohlangabezana nezidingo zakho ezithile. Khumbula, ukusebenzisa i-polymer powder e-redispersible efanele ngeke nje kuthuthukise izakhiwo zodaka lwakho, kodwa futhi kunciphise ingozi yokuqhekeka, ukuncipha kanye nothuli, okuholela ekuqedeni okuhlala isikhathi eside nokuhle.
Isikhathi sokuthumela: Sep-14-2023